FITTOXIA. 131 



V. 3307. A long specimen with, distinct constrictions at fairly 

 regular intervals; the surface projections are rather broader than 

 iu many examples, and resemble those in V. 2332 ; they show 

 a considerable variation in size, some being identical with the 

 usual clathrarian form of medullary ray cast, and others larger 

 and more prominent. 



V. 3306. Here again there is a marked variation in the size of 

 the ray impressions. A well-defined branch scar. 



V. 7130. Hastings. Daivson Coll. 

 V. 1880. Near Hastings. Dawson Coll. 

 V. 2249. Ecclesbourne. Ru/ord Coll. 

 8272. Large specimen. 



Genus FITTONTA, Carruthers. 

 [Trans. Linn. Soc. vol. xxvi. 1870, p. 690.] 



This generic name was proposed by Carruthers for an unusually 

 perfect specimen of a structureless cycadean stem, which was 

 probably obtained from the "VVealden of Brook, in the Isle of 

 "Wight. Mantell first figured and described this specimen as 

 Clatliraria Lyelli in his Geological Excursions round the Isle of 

 Wight 1 ; a larger and more complete figure appears in Carruthers' 

 Monograph. The genus is thus defined : 



" Trunk short, obovate ; woody axis slender, enlarging upwards ; 

 cortical layer large. Scales and bases of the petioles large, 

 imbricated, at first reflexed, then ascending." 



Carruthers notes the absence of any fruit or foliage which 

 can be referred to this form of stem, but he considers the 

 resemblance to Enceplialartos sufficiently distinct to justify him 

 assigning Fittonia to a position near to the living genus. Saporta 

 adopts the name, and points out the resemblance between Fittonia 

 and BucTdandia ; he calls attention, however, to certain points 



1 p. 297. 



